Greenhouse white fly
Description Greenhouse white fly, also known as Trialeurodes vaporariorum is a sap feeder. The easiest way to find white flies is to brush or shake...
Category Archives: Pests
Spread of viruses in greenhouses
There are various ways viruses can spread throughout the greenhouse. Transmission or method of spreading depends on the virus genes. A virus cannot move from...
Source of viruses in a greenhouse
Everyone has become more knowledgeable about the spread of viruses and the diseases they cause. Just like the COVID virus, we have to understand the...
The basic principles of a good spray program
Well planned spray programs are more effective than unplanned, random chemical applications. Have you ever considered spraying when there is no pests or diseases? Poorly...
Basic pest and disease resistance management strategies in greenhouses
Resistance to chemicals is due to the intense selection pressure exerted on the population that is controlled. There is only a limited number of chemicals...
Onion thrips
Description Thrips tabaci and western flower thrips Frankliniella occidentalis are sap feeders. Common thrips as in the main image; Order: Thysanoptera, Family: Thripidae. They are...
Tomato russet mite
Description Russet mites (Aculops lycopersici, Aculus lycopersici) are so small that a 14X hand lens is needed to see them. Because of their size, these...
Plusia looper
Plusia looper description Plusia looper, also known as Cabbage looper or more correctly Trichoplusia ni are light green caterpillars with white or pale yellow stripes...
American Bollworm
Bollworm description Bollworm, also known as tomato fruit worm or American Bollworm, Helicoverpa armigera, are small caterpillars (about 30mm long, slightly more than 1 inch)...
Sweet potato whitefly
Sweet potato whitefly description Sweet potato whitefly (Bemisia tabaci, order Hemiptera and family Aleyrodidae) is a sap feeder. The adults are about 4-5mm long with...
Red spider mite
Red spider mite description Red spider mite, of the genus Tetranychus urticae, are sap feeders. Although there are several species of spider mites which attack...
Leaf hopper
Leaf hopper description Leaf hoppers are usually less then 13mm in length, with long slender tapered bodies. They tend to be pale green to tan...
Leaf miner
Leaf miner description The adult leaf miner (Liriomyza sativae) is a 1-1.8mm long shiny black fly with a prominent yellow triangle between the bases of...
Whiteflies in greenhouses
Description of whiteflies Whiteflies are about 1.5mm long, the adult is white which resembles a tiny moth. They produce oblong eggs, pale green to purple...
